Hi! I see you’re facing a blank screen issue with the Tuta app on your iPhone 6s while it works fine on your tablet. Let’s get to the bottom of this together.

To start, could you tell me if you’ve tried any steps already, like restarting the iPhone or reinstalling the app?

If not, here’s a simple step-by-step we can try:

1. Force Quit the Tuta App:
Double-press the Home button on your iPhone 6s to bring up app previews, then swipe up on the Tuta app to close it completely. After that, reopen the app.

2. Restart Your iPhone:
Hold the power button and swipe to power off. Turn it back on and check if the app loads correctly.

3. Check for App Updates:
Open the App Store, go to Updates, and ensure Tuta is updated to the latest version.

4. Reinstall the Tuta App:
Press and hold the Tuta app icon, tap “Delete App,” then go to the App Store and reinstall it.

5. Check iOS Version:
Since you’re on an iPhone 6s, and currently running iOS 10 as you mentioned your tablet is fine but iPhone not, it might be helpful to verify your iPhone iOS version. Go to Settings > General > About > Software Version. If it is below iOS 13, some newer app versions might not be fully compatible. Consider updating your iOS if possible (to at least iOS 13 if your device supports it).

6. Clear Cache or Data (if available within the app settings).

Since you mention a blank screen only on the iPhone 6s, it could be a compatibility issue or temporary app glitch, but these steps usually resolve those.

If you’ve already completed these, or the problem persists after these attempts, let me know. We can further troubleshoot advanced settings or check for any account or server-related issues.

Are you comfortable trying these steps? I’m here to help walk you through any if needed.